ASME B18 2 2-2010

Prévia do material em texto

Nuts for General
lRevision of ASfr¡iE/ANSI 318.2.2-19s7 (R2005)l
Appt¡cations: Machine
Screw Nuts, Hex,
Squarê, Hex Flargê,
and Coupling Nuts
(l nch Series)
ASME 819.2.2-2010
INTENTIONALLY LEFT BLANK
ASME B^18.2.2-2010
[Revision of ASME/ANSI 8t8.2.2-1987 (R2005)l
Nuts for General
Appl¡cations: Machine
Screw Nuts, Hex,
Squarê, Hex Flargê,
and Coupling Nuts
(l nch Series)
This Standard will be revised when the Society approves the issuance of a new edition. There will
be no addenda issued to this edition.
ASME issues written repties to inquiries concerning interpretations of technicaI aspects of this
Standard. Periodicatty certain actions of the ASME 818 Committee may be pubtished as Cases. Cases
and interpretations are published on the ASME Web site under the Committee Pages at
http://cstools.asme.org as they are issued.
Date of lssuance: November 30, 2010
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This code or standard was developed under procedures accredited as meeting the criteria for American National
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ASME does not "approve," "rate," or "endorse" any item, constluct¡on, proprietary device, or activity.
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The American Society of Mechanical Engineers
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Copyright @ 2010 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
Al[ rights reserved
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Foreword
Committee Roster
Correspondence With the 818 Committee
I lntroduction
2
3
References.
Tables
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1.-2
2
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4
5
6
7
8
9
10
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T2
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CONTENTS
General Data.
Dimensions of Square and Hex Machine Screw Nuts
Dimensions of Small Pattem Hex Machine Screw Nuts
Dimensions of Square Nuts
Dimensions of Hex Flat Nuts and Hex Flat jam Nuts
Dimensions of Hex Nuts and Hex jam Nuts
Dimensíons of Hex Slotted Nuts
Dimensions of Hex Thick Nuts
Dimensions of Hex Thick Slotted Nuts
Dimensions of Heavy Square Nuts
Dimensions of Heavy Hex Flat Nuts and Heavy Hex Flat Jam Nuts
Dimensions of Heavy Hex Nuts and Heavy Hex Jam Nuts
Dimensions of Heavy Hex Slotted Nuts
Dimensions of Hex Flange Nuts and Large Hex Flange Nuts
Mandatory Appendlx
I Slot Gages and Gaging for Slotted Nuts
Nonmandatory Appendices
Dimensions of Hex Coupling Nuts
A Formulas for Nut Dimensions
B Wrench Openings for Square and Hex Nuts
iv
vi
vii
1
1
1
4
5
6
7
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10
11
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1.3
't4
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American National Standards Committee 818 for the standardization of bolts, screws, nuts,
rivets, and similar fasteners was organized in March 1922 as Sectional Committee 818 under
the aegis of the American Engineering Standards Committee (later the American Standards
Association, then the United States of America Standards Institute, Inc.) with the Society of
Automotive Engineers and the American Society of Mechanical Engineers as joint sPotìsors.
Subcommittee 2 was subsequently established and charged with the responsibility for technical
content of standards covering wrench head bolts and nuts.
Subcommittee 2, after appraisal of the requirements of industry, developed a proposed standard
series of bolt head and nut dimensions. This proposal was finally approved and designated a
Tentative American Standard in February 1927.
A first revision of the document was designated as an American Standard in March 1933 and
was followed by a second revision that was granted approval as an American Standard in
lanuaty 194I.
Following reorganization of the 818 Committee tn1947, Subcommittee 2 was asked to expand
the standard on head proportions into a complete product standard. A proposal covering square
and hexagon head bolts and nuts, hexagon head cap screws, and automotive hexagon head bolts
was prepared and submitted to the 818 Committee in April 1950. \^/hile this draft was under
consideration, the 818 Committee received a proposal from the British Standards Institution
for unification of dimensions on products incorporating unified screw threads. The Committee
welcomed the opportunity of discussing the proposals and an American-British-Canadian
Conference was held in New York on June L and 2,7950.
It was agreed in the conference that the essentials of unification could be accomplished by
selection of mutually satisfactory across-the-flats dimensions, since this would permit the use of
the same wrenches and because other features would rarely affect interchangeability. After due
consideration, suitable existing across-the-flats dimensions were selected for the hexagon products
affected.
In its meeting of October 13, 1950, Subcommittee 2 agreed to incorporate into the proposed
standard the conference recommendations on 7a in. hexagon head bolts, 76 in. hexagon head cap
screws and automotive hexagon head bolts, and\6 in. Iight and regular hexagon and square
nuts. At a subsequent meeting of Subcommittee 2, further changes were adopted in order to
combine the light and regular series of nuts, and to combine the automotive hexagon head bolt,
hexagon head cap screw, and regular hexagon head close tolerance bolt.
In view of the progress made in the United States and the urgency of standardization for
mutual defense, the British Standards Institution sponsored a second conference in London in
April 1951 to complete the unification of certain hexagon bolts and nuts.
At a meeting on Iune 8, 1951, Subcommittee 2 reaffirmed its acceptance of the unified dimensions
that correspond with those in the March 1951 draft, but attempted to select better nomenclature
for the unified products. A final draft incorporating the nomenclature "Finished Hexagon Bolts
and Nuts" and containing numerous editorial changes was submitted for letter ballot in September
1951. Following approval by the 818 Committee and the sponsors, the proposal was presented
to the American Standards Association for approval and designation as an American Standard.
This was granted on March 24, 1952.
It was recognized that the standard was in need of additional refinements, therefore
Subcommittee 2 began work immediately to eliminate these shortcomings. A proposed revision
removing inconsistencies with respect to fillets, improving the length tolerances on heavy hexagon
bolts, and incorporating numerous other corrections and clarifications of an editorial nature
resulted. The most notewortþ editorial change was a decision to combine the coveragefor
hexagon cap screws and square head set screws from the 818.2 standard with the coverage for
slotted head cap screws and slotted headless set screws from the 818.6 standard for publication
in a separate document. The requirements for the unified hexagon cap screws and finished
iv
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FOREWORD
hexagon bolts being identical in the overlapping sizes, the data would now be available in two
publications. Following approvals by the 818 Committee and sponsor organizations, the proposal
was submitted to the American Standards Association and declared an American Standard on
February 2,1955.
A revision of this Standard comprised of numerous editorial corrections and inclusion of an
appendix for grade markings was duly approved and designated an American Standard on
April 18, 1960.
At a meeting in February 1960, Subcommittee 2 approved a recommendation to reduce the head
heights for heavy, heavy semifinished, and heavy finished hexagon bolt, which was subsequently
approved by letter ballot of the 818 Committee on August 16, 7960. A proposed standard for
heavy hexagon structural bolts submitted and accepted by Subcommittee 2 at its October 17,
1960 meeting was approved by letter ballot of the 818 Committee on May 9,1961. To meet the
urgent needs of the steel construction industry, it was considered necessary to publish the standard
for the structural bolts immediately. Consequently, Appendix IV to ASA 818.2-1960 containing
coverage for the revised heavy hexagon bolts and the new heavy hexagon structural bolts was
released lu:.1962.
In October 196i., Subcommittee 2 appointed a subgroup to review all product standards for
square and hexagon bolts, screws, and nuts, and to recommend simplifications that would be
compatible with technical, production, and distribution advances that had occurred over the prior
several years. The subgroup presented its recommendations at a meeting of Subcommittee 2 in
October 1962. lt was agreed that the internally and externally threaded products should be
published in separate documents as suggested, and draft proposals for each were completed.
The proposed revision for square and hex nuts incorporated the following subgroup recommen-
dations: discontinuation of regular semifinished nuts; elimination of regular hexagon and heavy
hexagon nuts in sizesla in. through 1 in.; elimination of finished hexagon nuts in sizes larger
thanTl2 in.; elimination of the washer face semifinished style on finished series nuts in sizes
s4 in. and smaller and heavy series nuts in sizes 7/16 in. and smaller; removal of machine screw
nuts (these nuts are now contained in 818.6.3); and adoption of an abbreviated product nomencla-
ture. Letter ballot of this proposal to the 818 Committee resulted in approval. Following acceptance
by the sponsor organizations the revision was submitted to the American Standards Association
and designated ASA 818.2.2 on September 8, 1965.
Subcommittee 2 continued to further develop refinements initiated by the simplification sub-
group and to study changes suggested by consumer interests. This work culminated in Subcom-
mittee acceptance of a 1970 proposal incorporating, in addition to numerous editorial changes,
revisions to the requirements on angularity of bearing face and countersink diameters for the
various hex nuts and heavy hex nuts, and inclusion of an appendix covering the gaging of slots
in slotted nuts.
The proposed revisiory after approval by letter ballot of the 818 Committee in March 1970,
was subsequently approved by the sponsors and submitted to the American National Standards
Institute for designation as an American National Standard. This was granted onlanuary 18,1972.
A proposed revision of this Standard agreed upon by Subcommittee 2 incorporated a provision
to enable consumers to specify heavy hex nuts and heavy hex jam nuts with close bearing face
angularity, when required; clarified intent with regard to width across flats on nuts produced
from bar stocki deleted coverage for hex castle nuts from the appendices; and included numerous
editorial refinements. This proposal was formally approved by letter ballot of the subcommittee
and the 818 Committee. Following its acceptance by the sponsor organizations the revision was
referred to the American National Standards Institute and granted approval as an American
National Standard on February 27,1987.
In March 2009 the 818.2 Subcommittee undertook a revision of this Standard. The format has
been updated to meet the requirements of ASME 818.12.1. Regular pattem machine screw nuts
have been moved from ASME 818.6.3, and the small pattern machine screw nuts have been
added to this Standard. The hex flange nut that was previously referred to as IFI-145 has been
added. Coupling nuts have been added. Many of the sizes came from the IFI-128 and others
were based on what has been used for many years by industry. This proposal was formally
approved by letter ballot of the subcommittee and the 818 Committee. Following its acceptance
by the sponsor organizations, the revision was referred to the American National Standards
Institute and granted approval as an American National Standard on August 24,2010.
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Standardization of Bolts, Nuts, Rivets, Screws,
ASME 818 COMMITTEE
Washers, and Similar Fasteners
Ohe following is the roster of the Committee at the time of approval of this Standard.)
V. Cartlna, Autocraft lndustrial
D. A. Clever, Consultant
P, Cockman, Ford Motor Co.
C. A. Dugal de la Garza, TSB lnc.
D. S. George, ND lndustries
C, J. Gomez, The Amerlcan Society of Mechanical Engineers
j. Greenslade, lndustrial Fasteners lnstitute
l. f. Grey, Contributing Member, Fastener Consulting Services, lnc.
B. Hasluk, Contríbuting Member, Defense Supply Center
Phitadelphia
A. Herskovltz, Consultant
J. Hubbard, Leland-Powell Fasteners, lnc.
,. Jennlngs, Contributing Member, Naval Surface Warfare Center
W. H. Klng, Porteous Fastener Co.
J. t Koehl, Contr¡buting Member, Spirol lnternational Corp.
STANDARDS COMMITTEE OIIICERS
¡. Greenslade, Cåair
D. S. George, Vice Chair
R. D. Strong, Vice Chair
C. l. Gomez, Secretory
STANDARDS COMMITTEE PERSONNET
W. H. Kopke, Consultant
W. R. Stevens, Chair, Ramco Specialties, lnc.
V. Cartlna, Vice Chaír, Consultant
A. P. Cockman, Ford Motor Co.
B. A. Duslna, Federal Screw Works
M. A. Elml, Caterpillar
D. S. George, ND lndustr¡es
l. Greenslade, lndustrial Fasteners lnstitute
,. r. Grey, Fastener Consulting Services, lnc.
W. l. Lutkus, Emhart Technologies
D. Mccrlndle, Canadian Fasteners lnstitute
M. D. Prasad, Contributing Member, Gtobal M&F Solutions, lnc.
S. Savoll, ITW Medalist
W. Schevey, Contributing Member, BGM Fastener Co., lnc.
Q. M. Smlth lll, oregon Department of Transportation
W. R. Stevens, Ramco Specialties, lnc.
R. D. Strong, Consultant
S. W. Vass, Consultant
C. B. Wackrow, MNP Corp.
W. K. Wllcox, Consultant
C. B. Wllllamson, Fastenal Co.
C. l. Wllson, Consultant
R. B. Wdght, Contributing Member, Wright Tool Co.
J. G. Zeratsl(y, National Rivet and Manufacturing Co.
SUBCOMMITTEE 16 - NUTS
l. lennlngs, Naval Surface Warfare Center
I, F. Mccanlclç Defense Supply Center Philadelphia
W. L. Sakowskl, Account Managers LLC
R. M. Serabln' Freundlich Supply Co.
D. F, Sharp, GMS Structural Engineers
D. r. Soscla, Electric Boat CorP.
W. K. Wllcox, Consultant
C, B. Wllllamson, Fastenal Co.
C. J. Wllson, Consultant
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CORRESPONDENCE WITH THE B18 COMMITTEE
General. ASME Standards are developed and maintained with the intent to represent the
consensus of concerned interests. As such, users of this Standard may interact with the Committee
by requesting interpretations, proposing revisions, and attendingCommittee meetings. Corre-
spondence should be addressed to:
?äii'J,i.'"i:H3üiii,xüllllå,,,g."u.,
Ihree Park Avenue
il'#r)ii."X.l"'.'r'r',ff ü,
Proposing Revisions. Revisions are made periodically to the Standard to incorporate changes
that appear necessary or desirable, as demonstrated by the experience gained from the application
of the Standard. Approved revisions will be published periodically.
The Committee welcomes proposals for revisions to this Standard. Such proposals should be
as specific as possible, citing the paragraph number(s), the proposed wording, and a detailed
description of the reasons for the proposal, including any pertinent documentation.
Proposing a Case. Cases may be issued for the purpose of providing alternative rules when
justified, to permit early implementation of an approved revision when the need is urgent, or to
provide rules not covered by existing provisions. Cases are effective immediately upon ASME
approval and shall be posted on the ASME Committee Web page.
Requests for Cases shall provide a Statement of Need and Background lnformation. The request
should identify the standard, the paragraph, figure or table number(s), and be written as a
Question and Reply in the same format as existing Cases. Requests for Cases should also indicate
the applicable edition(s) of the standard to which the proposed Case applies.
lnterpretations. Upon reques! the 818 Standards Committee will render an interpretation of
any requirement of the Standard. Interpretations can only be rendered in response to a written
request sent to the Secretary of the 8L8 Standards Committee.
The request for an interpretation should be clear and unambiguous. It is further recommended
that the inquirer submit his/her request in the following format:
Subject: Cite the applicable paragraph number(s) and the topic of the inquiry.
Edition: Cite the applicable edition of the Standard for which the interpretation is
being requested.
Question: Phrase the question as a request for an interpretation of a specific requirement
suitable for general understanding and use, not as a request for an approval
of a proprietary design or situation. The inquirer may also include any plans
or drawings that are necessary to explain the question; however, they should
not contain proprietary names or information.
Requests that are not in this format may be rewritten in the appropriate format by the Committee
prior to being answered, which may inadvertently change the intent of the original request.
ASME procedures provide for reconsideration of any interpretation when or if additional
information that might affect an interpretation is available. Further, persons aggrieved by an
interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not
"approve," "cettify," "rate," or "endorse" any item, construction, proprietary device, or activity.
Attending Committee Meetings. The 818 Standards Committee regularly holds meetings that
are open to the public. Persons wishing to attend any meeting should contact the Secretary of
the 818 Standards Committee.
vii
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INTENTIONALLY LEFT BLANK
vlll
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Nuts for General Applications: Machine Screw Nuts, Hex,
Square, Hex Flange, and Coupling Nuts (lnch Series)
1 INTRODUCTION
1.1 Scope
1.1.1 This Standard is intended to cover the com-
plete general and dimensional data for the various tyPes
of inch series square and hex nuts, including machine
screw nuts and coupling nuts, recognized as American
National Standard. Also included are appendices cov-
ering gaging of slots in slotted nuts, wrench openings
for nuts, and formulas on which dimensional data are
based. It should be understood, however, that where
questions arise concerning acceptance of product, the
dimensions in the tables shall govem over recalculation
by formula.
7,7,2 The inclusion of dimensional data in this
Standard is not intended to imply that all of the products
described herein are stock production sizes. Consumers
are requested to consult with manufacturers conceming
lists of stock production sizes.
1.2 Comparison to l5O Standards
There are no comparable ISO inch fastener standards.
1.3 Dimensions
Unless otherwise indicated, units of measurement are
expressed in inches.
1.4 Options
Where options are allowed, they shall be selected at
the manufacturer's discretion unless otherwise specified
by the purchaser.
1.5 Terminologry References
For definitions of terminology not specifically defined
in this Standard, refer to ASME 818.12.
2 REFERENCES
Unless otherwise specified, the standards referenced
shall be the latest edition at the time of order placement.
ASME 81.1, Unified Inch Screw Threads (UN and UNR
Thread Form)
ASME 8L.3, Screw Thread Gaging Systems for
Acceptability: Inch and Metric Screw Threads (UN,
UNR, UNI, M, and MJ)
ASME 818.2.2-2010
ASME 818.1.2, Glossary of Terms for Mechanical
Fasteners
ASME 818.18.2, Inspection and Quality Assurance for
High-Volume Machine Assembly Fasteners
ASME 818.24, Part Identifying Number (PIN) Code
System for 818 Fastener Products
ASME 8107 Series, Standards for Hand Tools
Publisher: The American Society of Mechanical
Engineers (ASME) Three Park Avenue, New York, NY
10016-5990; Order Department: 22 Law Drive, P.O.
Box 2900, Fairfield, NI 07007-2900 (www.asme.org)
ASTM A 563, Standard Specification for Carbon and
Alloy Steel Nuts
ASTM F 467, Standard Specification for Nonferrous
Nuts for General Use
ASTM F 594, Standard Specification for Stainless Steel
Nuts
ASTM F 8I2/F 8L2M, Standard Specification for Surface
Discontinuities of Nuts, Inch and Metric Series
ASTM F '1.94'1., Specification for Electrodeposited
Coatings on Threaded Fasteners [Unified Inch Screw
Threads (UN/UNR)I
Publisher: American Society for Testing and Materials
(ASTM International), 100 Barr Harbor Drive, West
Conshohocken, PA 19428 (www.astm.org)
SAE 1995, Mechanical and Material Requirements for
Steel Nuts
Publisher: SAE International, 400 Commonwealth Drive,
Warrendale, PA 15096 (www.sae.org)
3 GENERAL DATA
3.1 W¡dth Across Flats
The width across flats of nut shall be the distance
measured, perpendicular to the axis of nut, overall
between two opposite sides of the nut in accordance
with the notes on respective dimensional tables.
Maximum width across flats shall not be exceeded,
except as stated below No transverse section through
the nut between2í"/o and75"/" of the actual nut thickness
as measured from the bearing surface shall be less than
the minimum width across flats.
NOTE: Nonferrous milled-from-bar hex nuts: The minimum
across flats dimensions of nonferrous milled-from-bar hex nuts
shall not be less than the values tabulated in Tables 1-1 through
1
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13. The maximum across flats size may be greater than the tabu-
lated values in Tables 1-1 through 13, but shall not be equal to or
greater than the minimum wrench opening shown in Table B-1,
Nonmandatory Appendix B.
3.2 Corner Fill
A rounding or lack of fill at junction of hex corners
with chamfer shall be permissible, provided the width
across corners is within specified limits at and beyond
a distance equal to 17.5% of the basic thread diameter
from the chamfered face.
3.3 Tops of Nuts and Chamfers
Tops of nuts shall be flat and chamfered. Unless other-
wise spefified by the purchaser or in this Standard, nuts
in sizes 76 in. nominal size and smaller shall be double-
chamfered. Larger size nuts shall be double-chamfered
or have washer-faced bearing surface and chamfered
toP.
3.3.1 Single-Chamfered Nuts. Diameter of the
chamfer circle shall be equal to the maximum width
across flats within a tolerance of -75o/". The lengthof
chamfer at hex corners shall be from 5% to 15% of the
basic thread diameter. The surface of the chamfer may
be slightly convex or rounded.
3.3.2 Double-Chamfered Nuts and Washer-Faced
N uts. The diameter of chamfer circle on
double-chamfered nuts and washer-faced nuts shall be
within the limits of the maximum width across flats and
95% of the minimum width-across-flats.
3.4 Countersink
Unless otherwise specified in this Standard, tapped
holes shall be countersunk on the bearing faces. The
maximum countersink diameter shall be the thread basic
(nominal) major diameter plus 0.030 in. for 76 in. nominal
size nuts and smaller, and 1.08 times the basic major
diameter for nuts larger than 76 in. No part of the
threaded portion shall project beyond the bearing
surface.
3.5 Nut Thickness
The nut thickness shall be the overall distance, mea-
sured parallel to the axis of nut, from the top of the nut
to the bearing surface and shall include the thickness
of the washer face where provided.
3.6 Washer Face Diameter
Unless otherwise specified, the diameter of washer
face shall be within the limits of the maximum width
across flats and95o/. of the minimum width across flats.
3.7 Stots
When specified in the respective dimensional table,
slots shall be normal to nut flats. Contour of bottom of
ASME 818.2,2.2010
slots shall be at manufacturer's option. Requirements
for gaging slots are specified in Mandatory Appendix I.
3.8 True Position of Tapped Hote
3.8.1 Hex Nuts. The axis of tapped hole in hex nuts
shall be located at true Position with resPect to the axis
of nut body within a tolerance zone having a diameter
equivalent to 4"/" of the maximum width across flats
lor 112 n. nominal size nuts or smaller and 6% of the
maximum width across flats for nuts larger than 1l in.,
regardless of feature size.
3.8.2 Square Nuts. Theaxisof tappedholeinsquare
nuts shall be located at true position with respect to
the axis of nut body within a tolerance zone having a
diameter equivalent to I0% of the maximum width
across flats, regardless of feature size.
3.9 Bearing Surface Perpendicularity
Bearing surface shall be flat and perpendicular to the
axis of the threaded hole within the specified full indica-
tor measurement (FIM) limit indicated in the tables.
3.10 Threads
3.10.1 Thread Class. Threads shall be Unified
Standard, Class 28, of the series specified in the notes
on respective dimensional tables, in accordance with
ASME 81.1. Class 3B may be specified by the purchaser
if designated at the time of inquiry and order.
3.10.2 Thread Gaging. Unless otherwise specified
by the purchaser, gaging for screw thread dimensional
acceptability shall be in accordance with Gaging System
21 as specified in ASME 81.3, Screw Thread Gaging
Systems for Dimensional Acceptability.
3.11 Material
Unless otherwise specified by the purchaser or else-
where in this Standard, chemical and mechanical prop-
erties of steel nuts shall conform to Grade A of
ASTM A 563, Carbon and Alloy Steel Nuts or Grade 2
(square nuts only) of SAE J995. Nuts of other materials
such as corrosion resistant (stainless) steel, brass, bronze,
and aluminum alloys shall have properties as agreed
upon between the manufacturer and purchaser. Refer
to ASTM F 594 for information on corrosion resistant
alloy steel requirements and ASTM F 467 for information
on nonferrous materials.
3.12 Finish
Unless otherwise specified, nuts shall be supplied
with a natural (as-processed) finish, unplated or
uncoated. If electroplated finishes are required, reference
ASTM F 1941. Other finishes may be specified as indi-
cated in the applicable mechanical and performance
standards.
2
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3.13 Designation
3.73.7 Nuts shall be designated by the following
data in the sequence shown: product namei dimensional
standard, nominal size (fraction or decimal); threads per
inch; mechanical and performance standard, and grade
protective finish (including specification and thickness),
if required.
EXAMPLES:
(1) Square Nut, ASME F18.2.2,y2-L3, ASTM A 563 Grade A, Zinc
Plated per ASTM F 1941 Fe/Zn 3A
(2) Hex Nu! ASME 878.2.2,3/4-16, SAE J995 Grade 5, Steel
(3) Hex Thick Slotted Nut, ASME 818.2.2, 1.000-8, ASTM F 594
(Alloy Group 1) Corrosion Resistant Steel
3.73.2 For part identification numbers (PIN), refer
to ASME 818.24. For machine screw nut PINS, use the
ASME 818.2.2-2010
AEN24 and AEN25 family types under ASME 818.6.3
until ASME 818.24 is revised to list the types covered
in this Standard.
3.14 Gnde and Manufacturer's ldentification
Marking
Grade and manufacturer's markings shall be applied
as required by the applicable mechanical and perform-
ance standard except that markings are not required for
the machine screw nuts per Tables 1-1 and 1-2.
3.15 lnspectlon and Quatity Assurance
Unless otherwise specified, product quality shall be
determined according to ASME 818.18.2.
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ASME 818.2.2-2010
Table 1-1 Dimensions of Square and Hex Machine Screw Nuts
Basic Maior
Nominal Diameter
Size of Thread
0
7
2
3
4
5
6
8
10
72
1t
/16
3/
/a
0.060
0.o73
0.086
0.099
o.772
o.725
0.1 38
0.764
0.190
o.276
0.250
0.J72
0.375
Chamfered
Width Across Flats, F
Basic
5/
/32
'/zz
1/
/16
'he
1t
/4
'Ae
5/rø
11t
/32
3t
/a
,/re
/16
'/tt
5/
/E
Machine Screw Nuts tNote (1ll
0.150 0.756
0.150 0.756
0.180 0.188
0.180 0.188
0.247 0.250
0.302 0.372
0.302 0.)72
0.3)2 0.)44
0.362 0.375
0.423 0.438
0.423 0.438
0.545 0.562
0.607 0.625
GENERAL NOTES:
(a) For additional requirements refer to section 3, General Data.
(b) Materiol. Untess otherwise specified, machine screw nuts shall be made of carbon steel'
(c) Mechonicat Property Requirements. Unless the purchaser specifies otherwise in the inquiry and purchase documents, machine screw
nuts have no mechanical requirements.
NOTE:
(1) As shown ¡n the Rgure, no countersink is required.
Square, G Hex, Gr
Width Across Corners
Min, Max, Min, Max. Min. Max.
0.206 0.227 0.777
0.206 0.227 0.777
0.247 0.265 0.205
0.247 0.265 0.205
0.331 0.354 0.275
0.475 0.442 0.344
0.475 0.442 0.J44
0.456 0.486 0.)78
0.497 0.53 0.473
0.581 0.679 0.482
0.581 0.679 0.482
0.748 0.795 0.627
0.833 0.884 0.692
Bottom
Bear¡ng SurfaceThickness Runout toìhread Axis,
0.180 0.043
0.180 0.043
0.277 0.057
0.277 0.057
0.289 0.087
0.767 0.702
0.167 0.102
0.397 0.777
0.433 0.777
0.505 0.148
0.505 0.778
0.65 0.208
0.722 0.2)9
4
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0.050
0.050
0.066
0.066
0.098
o.774
0.774
0.130
0.130
0.161
0.193
0.225
0.257
0.005
0.005
0.006
0.006
0.009
0.011
0.011
0.012
0.013
0.015
0.015
0.020
0.021
ASME 818.2,2-2010
Table 1-2 Dimensions of Small Pattern Hex Machine Screw Nuts
Chamfered
Nominal
Size
0
7
2
3
4
5
6
I
10
Basic Maior
Diameter of
Thread
0.060
0.o73
0.086
0.099
0.772
0.725
0.138
0.764
0.19
GENERAL NOTES:
(a) For additional requirements refer to section 3, General Data.
(b) Material. Unless otherwise specified, machine screw nuts shal[ be made of carbon steel.
(c) Mechanicol Property Requ¡rements. Unless the purchaser specifies otherwise in the inquiry and purchase documents, machine screw
nuts have no mechanical requirements.
NOTE:
(1) As shown in the figure, no countersink is required.
Baslc
Width Across Flats, F
Note (f I
1/
/a
l/
/a
/32
St
/32
3t
/16
1t
7rc
11t
/32
-/B
Min.
Bottom
o.727
o.727
0.150
0.1 50
0.180
o.247
0.302
o.)32
0.362
Max.
Width Across
Corners
o.725
0.725
0.756
0.756
0.188
0.25
0.372
0.344
0.375
Mln,
Hex, Gr
0.734
0.7J4
0.777
0.777
o.20s
o.275
o.344
o.378
o.47)
0.140
0.140
0.180
0.180
o.277
o.289
0.361
0.397
0.433
Thickness
Min. Max,
5
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0.043
0.os7
0.o57
0.o87
o.702
0.702
0.777
o.777
Bearing
Surface
Runout
to
Thread
Axls. FIM
0.050
0.050
0.066
0.066
0.098
0.774
o.174
0.13
0.13
0.005
0.005
0.006
0.006
0.009
0.011
0.011
0.012
0.013
ASME 818.2.2-2010
Table 2 Dimensions of Square Nuts
Basic Major
Nominal Diameter of
Size Thread
5/
/16
Te
,/r,
/2
5l
/8
1t
/B
1
1%
1Y4
73/e
1%
0.2500
o.3725
o.3750
o.4i75
0.5000
o.6250
0.7500
0.8750
1.0000
7.7250
7.2500
7.)750
1.5000
Width Across tlats, F
lNote (2)]
Basic
Optional
/16
9/
/16
5l
/8
3/
73t
/16
1
1%
1%e
1%
7,,A"
77/e
21Áo
2l¡
Min.
GENERAL NoTE: For additional requirements, refer to section 3, General Data.
NOTES:
(1) See para. 3.1.
(2) As shown in the figure, no countersink is required.
Note (11
o.425
o.547
0.ó06
o.728
0.788
o.969
1.088
1.269
7.450
7.6)7
7.872
7.994
2.775
25 deg
approx.
Max,
Width Across
Corners, G
Min. Max,
0.4)8 0.554
0.562 0.727
o.62s 0.802
0.750 0.970
0.872 7.052
1.000 1.300
7.725 7.464
7.372 7.772
1.500 7.967
1.688 2.209
7.875 2.458
2.062 2.708
2.250 2.956
0.679
0.795
0.884
1.061
7.749
7.474
7.597
1.856
2.727
2.?86
2.652
2.977
3.782
Basic
Thickness
7/
/32
17/
/6tt
2\t
/64
l/
/8
7t
/16
J5/
/6L
21/
/32
Â9/
/61
/a
7
73Az
" 71/L /64
75Aø
Min. Max.
0.203 0.235
0.249 0.283
0.310 0.346
0.)56 0.794
0.418 0.458
0.525 0.569
0.6)2 0.680
0.740 0.792
0.847 0.903
0.970 1.030
7.062 7.726
7.769 7.2)7
7.276 7.348
6
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Bearing surface
Runout to
Thread Axis,
FIM
0.011
0.015
0.016
0.019
o,o22
0.026
0.o29
0.034
0.039
o.o29
0.032
0.035
0.039
ASME 818.2.2-2010
Basic Maior
Nominal Diameter of
Size Thread
1%
11,,
1%
1%
Ë
7.7250
7.2500
7.3750
1.5000
Width Across Flats, F
lNote (2)]
GENERAL NOTE: For additional requirements, refer to section 3, General Data.
NOTES:
(1) As shown in the figure, no countersink is required.
(2) See para. 3.1.
(3) See para. 3.2.
Basic Mln. Max, Min. Max. Basic Mln. Max. Baslc Min. Max. Axis, FIM
Ttltu
77/e
21Ae
2Y!
7 637
7 872
t 994
2 775
W¡dth Across
Corners, G
lNote (3)]
Ë
Note (11
1.688 7.859 7.949 7
7.87s 2.066 2.765 7%,
2.062 2.2n 2.782 7'%o
2.2sO 2.480 2.598 7%"
Thickness Hex Flat
Nuts, l,
0.970 7.$o %
7.062 7.726 r/4
7.769 7.237 1r/to
7.276 7348 7/8
Thickness Hex Flat
Jam Nuts, lr1
0.595 0.655
0.778 0.782
o.778 0.A46
0.839 0.911
7
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Bearing Surface
Runout to Thread
0.o29
0.o32
0.035
0.039
ASME 818.2.2-2010
Table 4 Dimensions of Hex Nuts and Hex Jam Nuts
ff,,il:;r1 H,-'H
Nominal
Size
Basic Maior width Across
Diameter of Flats' F
Thread M¡n. lvlaxl
7/
St
/16
/a
'/r
1t
/2
'/t¿,
5/
/a
tt
7/
/a
7
t%
t%
t%
t%
t%
t%
77/e
2
z%
2t/t
z3A
7
t%
3'/,
33/a
4
0.2 500
0.3725
o.3750
o.437 5
0.s000
o.5625
o.6250
0.7500
0.8750
1.0000
7.7250
1.2500
7.)750
1.5000
7.6250
7.7500
7.8750
2.0000
2.2500
2.5000
2.7500
3.0000
3,2500
3.5000
3.7s00
4.0000
0.428 0.438 0.488
0.489 0.500 0.557
0.551 0.563 0.628
0.675 0.688 0.768
0.736 0.750 0.840
0.861 0.875 0.982
0.922 0.938 1.051
1.088 7.725 7.240
7.269 7.)72 7.447
7.450 1.500 7.653
7.637 1.688 7.859
7.872 7.875 2,066
7.994 2.062 2.27)
2.775 2.250 2.480
2.35 2.ß 2.679
2.538 2.625 2.893
2.722 2.87J J.703
2.900 3.000 3.Jo6
J.26J 3.375 ).779
3.625 3.750 4.737
3.988 4.725 4.546
4.J50 4.500 4.959
4.773 4.875 5.373
5.075 5.250 5.786
5.4J8 5.625 6.799
5.800 6.000 6.672
Width Across Thickness Hex
Corners, G Nuts, H
Min. Max. Min. Max.
0.505 0.272
0.577 0.258
0.650 0.320
0.794 0.)65
0.866 0.427
1.010 0.471
1.083 0.5)5
7.299 0.677
7.576 0.724
7.732 0.831
7.949 0.939
2.765 1.030
2.)82 1.138
2.598 7.24s
2.805 7.]64
3.0J7 7.460
3.247 7.567
3.464 7.67 5
3.897 1.890
4.330 2.705
4.763 2.379
5.796 2.534
5.629 2.7 49
6.062 2.964
6.495 1.778
6.928 3.393
Thickness lam
Nuts, H1
Min. Max.
0.226 0.150 0.767
0.273 0.180 0.195
0.3)7 0.270 0.227
0.385 0.240 0.260
0.448 0.302 0.323
0.496 0.301 0.324
0.559 0.j63 0.387
0.665 0.398 0.446
0.776 0.458 0.510
0.887 0.519 0.575
0.999 0.579 0.639
7.094 0.687 0.757
7.206 0.747 0.815
7.377 0.808 0.880
7.476 0.868 0.944
7.540 0.929 1.009
7.657 0.989 7.073
7.763 1.050 7.738
7.986 7.7s5 7.267
2.209 7.407 7.427
2.437 7.522 7.556
2.654 7.64J 7.685
2.877 7.748 7.A14
3.100 7.870 7.94)
3.322 7.990 2.072
3.545 2.772 2.207
GENERAL NoTE: For additional requirements, refer to section 3, General Data
Max¡mum Runout of Bearing
Surface to Thread Axis, FIM
Hex Nuts
Specifled Proof Hex lam
load Nuts
Up to 150,000 All
150,000 psi and Strength
ps¡ Greater Levels
0.015
0.016
0.o77
0.018
0.019
0.020
0.021
o.023
0.025
0.027
0.030
0.033
0.036
0.039
0.044
0.048
0.051
0.055
0.061
0.0ó8
0.o74
0.081
0.087
0.094
0.100
o.707
0.010 0.015
0.011 0.016
0.012 0.077
0.013 0.018
0.014 0.019
0.015 0.020
0.016 0.021
0.018 0.023
0.020 0.025
0.022 0.027
0.025 0.030
0.028 0.033
0.031 0.036
o.o34 0.039
0.038 0.044
0.041 0.048
0.044 0.051
0.047 0.055
0.052 0.061
0.058 0.068
0.064 0.074
0.070 0.081
o.o75 0.082
0.081 0.094
0.087 0.100
0.093 0.707
I
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leandro
Retângulo
PORCA SEXTAVADA NORMAL - TABELA 4
ASME 818,2,2-2010
Table 5 Dimensions of Hex Slotted Nuts
Nominal
Size
Basic Major
Diameter of
Thread
l/
h¿,
3t
/8
'/tt
1t
/2
'/rc
/a
1/
7/
/a
7
1%
11,,
1%
1%
l<-¡l-+l l--¡l-t
I ¡!- o.o16in. l¡'f.-
#appr*_Ð
Width Across Flats, F
fNote (1)l
0.2500
0.J725
0.J7s0
0.4375
0.5000
o.5625
o.6250
0.7500
0.8750
1.0000
7.1250
1.2500
73750
1.5000
Basic Min, Max.
7/
/16
1t
/2
9/
/16
11/,.ø
3/
/8
lSt
/16
11/e
7%a
ltz
711Aa
77e
2%,
2y4
0.428 0.438
0.489 0.500
0.557 0.562
0.675 0.688
0.736 0.750
0.861 0.875
0.922 0.938
1.088 1.125
7.269 7.372
1.450 1.500
7.6j7 1.688
7.872 7.875
7.994 2.062
2.775 2.250
Width Across
Corners, G
lNote (2)]
Min. Max.
GENERAL NOTE: For additional requirements, refer to section 3, General Data.
NOTES:
(1) See para. 3.1.
(2) See para. 3.2.
(3) See para.3.7.
(4) See paras. 3.3 and 3,9.
0.488 0.505
0.557 0.577
0.628 0.650
o.768 0.794
0.840 0.866
0.982 1.010
1.051 1.083
7.240 7.299
7.447 7.576
7.65) 7.732
7.859 7.949
2.066 2.765
2.27J 2.382
2.480 2.598
Basic Min. Max,
Thickness, f,
/J2
l7t
/6t¿
21/
1/
/8
/16
11t
/6L
35/
/64
t1t
/6L
3t
Stt
/6L
3lt
/t2
1tA"
711/ø,,
7e/tz
Max¡mum
unstotted Runout of
Thickness, I W¡dth of slot, 5 tn:::i"
lNote (3)l lNote (3)] Thread Axis,
Min. Max. Min. Max, FIM lNote (4)]
0.272 0.226
0.258 0.273
0.J20 0.337
0.365 0.385
0.427 0.448
o.473 0.496
o.5)5 0.559
0.677 0.665
0.724 0.776
0.831 0.887
0.939 0.999
1.030 1.094
7.738 7.206
7.245 7.J77
0.12 0.74 0.07 0.10
0.16 0.18 0.09 0.72
0.19 0.27 0.72 0.15
0.27 0.n 0.72 0.15
0.27 0.29 0.15 0.18
0.29 0.31 0.15 0.18
o.32 0.34 0.18 0.24
0.38 0.40 0.18 0.24
o.49 0.s2 0.18 0.24
0.56 0.59 0.24 0.30
0.61 0.64 0.24 0.33
0.67 0.70 0.31 0.40
0.78 0.82 0.31 0.40
0.82 0.86 0.37 0.46
9
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0.015
0.016
0.018
0.018
0.019
0.020
0.021
o.o23
o.o25
0.o27
0.030
0.033
0.036
0.039
ASME 818.2.2.2010
Table 6 Dimensions of Hex Thick Nuts
Basic Maior width Across tlats' F
Nom¡nal Diameter of lNote (1)l
Size Thread Basic Min, Max,
7/
S/
/16
7e
7Ae
t
'ha
7a
3t
'/s
7
1%
11/4
7r/e
1%
0.2 500
o.3725
o.3750
o.4375
0.5000
o.5625
o.6250
0.7500
o.8750
1.0000
7.7250
7.2500
7.3750
1.5000
7/tø 0.428
% o.4gee/rø 0.551
"A" 0.675
% o.7i6
7, 0.86115/to 0.922
r% 1.088
75Áe 7.269
r% t.45o
t'yrc 7.6i1
77" r.8t2
21Ao 7.994
2t/û 2.775
0.01ô in.
approx.
Width Across
Corners, G
lNote (2)l
Mln, Max.
GENERAL NOTE: For additional requirements, refer to section 3, General Data.
NOTES:
(1) See para. 3.1.
(2) See para. 3.2.
(3) See paras. 3.3 and J.9.
0.438 0.488
0.500 0.557
0.562 0.628
0.688 0.768
o.7so 0.840
0.875 0.892
0.938 1.051
7.725 7.240
7.372 7.447
1.500 7.653
1.688 7.859
7.875 2.0662.062 2.271
2.250 2.480
0.505
0.577
0.650
0.794
o.866
1.010
1.083
7.299
7.576
7.732
7.949
2.765
2,)82
2.594
Baslc
Thickness, fl
'/12
21/
/66
13/
/32
29/, .
'/tt
39/
23/
/12
lJt
/16
"/¡z
1
7%,
7lo
73/e
1%
Min.
Maximum Runout of Bearing
Surface to Thread Axls, FIM
[Note (3)]
o.274 0.288
0.320 0.i36
0.398 0.475
0.444 0.463
0.552 0.573
0.598 0.627
0.706 0.7?7
0.798 0.827
0.890 0.922
0.982 1.018
7.7)6 7.776
7.228 7.272
7.357 7.399
7.474 7.526
Up to 150,000 psi
150,000 psi and Greater
Specified P¡oof Load
0.015
0.016
o.077
0.018
0.019
0.020
0.021
o.02J
o.025
o.027
0.030
0.033
0.036
0.039
0.010
0.011
0.012
0.013
o,074
0.015
0.016
0.018
0.020
o.022
0.025
0.028
0.031
0.034
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10
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ASME 818.2.2-2010
Table 7 Dimensions of Hex Thick Stotted Nuts
Nominal
Size
Basic Maior
Diameter of
Thread
tAu
3f
/a
t16
1/
9/
/16
/a
3t
/a
7
7le
71,,
7Ta
1%
k-s-+]
I -rL 0.016¡n.
b-j.| approx.
.Ð
Width Across Flats, F
tNote (1)l
0.2 500
o.3725
o.j750
0.4375
0.5000
o.5625
o.6250
0.7500
0.8750
1.0000
7.7250
1.2 500
7.3750
1.5000
Basic Min, Max. Min, Max. Baslc Min. Max' Min' Max.
7/rø
1//)
'/r
1lt
/16
7/
/a
75t/t6
1%
75Áø
1%
711/to
17e
2%a
21/'
0.428 0.4]8
0.489 0.500
o.557 0.s62
0.675 0.688
0.736 0.7s0
0.861 0.87 5
0.922 0.978
1.088 1.125
7.269 7.312
1.450 1.500
1.637 1.688
7.872 7.875
7.994 2.062
2.775 2.250
Width Across
Corners, G
[Note (2)l
GENERAL NOTE: For additional requirements, refer to section 3, General Data.
NOTES:
(1) See para. 3.1.
(2) See para. 3.2.
(3) See para. 3.7.
(4) See paras. 33 and 3.9.
0.488 0.505
0.557 0.577
0.628 0.650
0.768 0.794
0.840 0.866
0.982 1.010
1.051 1.083
7.240 7.299
7.447 7.576
7.651 7.732
7.859 7.949
2.066 2.765
2.27) 2.)82
2.480 2.598
UnsIotted
Thickness, f
Thickness, H lNote (3)]
9/
/32
21t
11/
/32
29t
9/
/16
39/
/6t
23//t2
/16
29/
/12
7
75/zz
1y4
1%
11,
0.274 0.288 0.18 0.20 0.07
0.120 0.376 0.22 0.24 0.09
0,398 0.475 0.27 0.29 0.72
0.444 0.463 0.29 0.31 0.72
0.552 0.577 0.40 0.42 0.15
0.598 0.621 0.47 0.43 0.15
0.706 0.737 0.49 0.51 0.18
0.798 0.827 0.55 0.57 0.18
0.890 0.922 0.64 0.67 0.18
0.982 1.018 0.70 0.7) 0.24
1.7J6 1.776 0.80 0.83 0.24
7.228 7.272 0.8ó 0.89 0.31
7.357 7.399 0.98 7.02 0.31
7.474 1.526 7.04 1.08 0.37
Width of Slot, S
fNote (3)l
Min. Max,
Maximum
Runout of
Bearlng
Surface to
Thread Axis,
FIM lNote (4)]
11
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0.10 0.015
o.72 0.016
0.15 0.077
0.15 0.018
0.18 0.019
0.18 0.020
0.24 0.021
0.24 0.023
o.24 0.025
0.30 0.027
o.33 0.030
0.40 0.033
0.40 0.036
0.46 0.039
ASME 818.2.2.2010
Tabte I Dimensions of Heavy Square Nuts
Nominal
Size
1/
/16
3/
/a
7t/t6
1/
/a
7/
fa
7
t%
tlo
t3/e
1%
Basic Maior
Diameter of
Thread
0.2500
o.3725
o.3750
o.4375
0.5000
o.6250
0.7500
0.8750
1.0000
7.7250
7.2500
7.37 50
1.5000
Width Across Flats, F
[Note (2)]
tH
1t
/2
9/
/16
17/
/16
1t
7t
/B
71Ae
1y4
77Áø
1%
¿1ltt /16
2
21Ae
2Te
I
Note (11
GENERAL NoTE: For additional requirements, refer to section 3, General Data.
NOTES:
(1) As shown in the figure, no countersink is required.
(2) See para. 3.1.
0.488
0.546
o.669
0.728
0.850
7.O37
7.272
7.)94
7.575
7.756
7.938
2.779
2.300
t\-/t
25des | \ / l25des
aporox.lJ ('l approx.
width Across
Corners, G
Min, Max.
0.500
0.562
0.688
0.750
0.875
7.062
7.250
7.4)a
7.625
7.872
2.000
2.188
2.)75
Optional
0.640
0.720
0.889
0.970
7.777
1.386
7.6)5
7.884
2.732
2.387
2.637
2.879
3.728
o.707
o.795
0.97)
1.060
7.2)7
7.503
1.768
2.O33
2.298
2.56J
2.828
3.O94
3.359
Bas¡c
Thickness. fl
-/r
/8
'/tt
It
/2
5/
/a
1/
'/s
7
1%
t%
t3/a
1%
0.218
0.280
o.347
0.403
o.464
o.587
o.770
0.833
0.956
7.O79
7.787
1.310
7.433
Bear¡ng
Surface
Runout to
Thread
Ax¡s, tlM
o.266
0.330
o.39i
0.456
0.520
o.647
o.77 4
0.901
1.028
7.755
1.282
7.409
7.5)6
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0.026
0.030
0.036
0.039
0.046
0.056
0.065
0.075
0.082
0.063
0.070
o.076
0.082
72
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ASME 818.2.2-2010
Table 9 Dimensions of Heavy
Basic Maior
Nomínal Diameter of
Size Thread
lYe
71,.
7Te
7t/,
lTt
2
2%
21/z
2%
3
3lo
)%
7t/o
4
Ë
7.7250
7.2500
7.3750
1.5000
7.7500
2.0000
2.2500
2.5000
2.7500
3.0000
J.2500
3.5000
1.7500
4.0000
W¡dth Across Flats, F
lNote (2)]
Baslc
7'3At 7.756
2 7,938
23Ao 2.779
2% 2.300
2Tn 2.662
)ls 3.025
)% 3.388
?7/e 3.750
4t, 4.172
47s 4.47s
5 4.838
sTe 5.200
57,, 5.562
61/a 5.925
Min.
H
Width Across
Corners, G
lNote (3)]
Min. Max,
Note (11
Max,
GENERAL NOTE: For additional requirements, refer to section 3, General Data.
NOTES:
(1) As shown in the figure, no countersink is required.
(2) See para. 3.1.
(3) See para. 3.2.
7.872 2.OO2
2.000 2.209
2.188 2.476
2.375 2.622
2.750 3.035
3.725 3.449
3.500 3.862
3.875 4.275
4.250 4.688
4.625 5.702
5.000 5.575
5.J75 5.928
5.750 6.347
6.725 6.755
Thickness Heavy Hex
Flat Nuts, f,
2.09)
2.309
2.526
2.742
).77 5
3.608
4.O47
4.47 4
4.907
5.340
5.77 4
6.207
6.640
7.07)
rls
|t/,,
73/t
llz
73/,,
2
21,,
2%
27,,
3Y,,
3t/z
13/,,
l!
Min.
1.079 7.755
7.787 7.282
1.310 7.409
7.43) 7.536
7.679 7.790
7.925 2.044
2.755 2.298
2.407 2.552
2.647 2.806
2.893 3.060
3.724 3.374
3.370 3.568
3.676 3.822
).862 4.076
Bearing
Surface
Thickness Heavy Hex Runout to
Flat ram Nuts, H1 Thread Axis,
Max. Basic Min. Max. F M
5/
/a
3/
13t
/16
7t
/a
1
7ls
11,,
1%
1%
77,,
77/e
2
21/e
2t/L
13
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0.579 0.65 5 0.072
0.687 0.782 0.034
0.7 47 0.846 0.038
0.808 0.911 0.041
0.929 1.040 0.048
1.050 7.769 0.054
7.755 7.298 0.061
7.407 7.552 0.067
7.522 1.681 0.074
7.643 1.810 0.080
7.748 7.939 0.087
7.870 2.068 0.093
7.990 2.797 0.100
2.772 2.326 1.06
Table 10 Dimensions of Heavy Hex Nuts and Heavy Hex fam Nuts
ASME 818.2.2-2010
ff'-*Ë ff*H
Basic Maior
Nominal Diameter
Size of Thread
It
%u
3/
/a
,/r,
l/
/2
'/tt
\t
/a
3/
/a
7
1%
1%
1%
1%
7s/a
77,,
77/s
2
2%
2lz
23/,,
3
J1/,,
31/z
)3/,,
4
Width Across
Width Across Flats, F Corners, G
lNote (1)l lNote (2)]
o.25OO l,
03725 e/ra
0.3750 11/tø
0.4375 %
o.5ooo 7,
0.5625 "/te0.6250 71,.a
o.75\o 1%
0.8750 77Áø
1.OO0O 1%
7.7250 713/to
7.2500 2
7.3750 2%ø
1.5OOO 23/e
7.6250 2e^o
7.7500 2%
7.8750 2tsÁe
2.0ooo 1%
2.2soo )%
2.5OOO J7/s
2.75OO |yt,
3.oooo 4%
3.2500 5
3.5OOO 53/s
3.7500 5%
4.oooo 6%
Basic Min. Max. Mln. Max. Basic Min. Max.
0.488 0.500 0.556 0.577
0.546 0.562 0.622 0.650
0.669 0.688 0.763 0.794
0.728 0.750 0.830 0.866
0.850 0.875 0.969 7.070
0.909 0.938 7.037 7.08)
7.037 7.062 7.775 1,227
7.272 7.250 7.782 7.443
7.394 7.438 1.589 1.660
7.575 7.625 7.796 7.876
7.756 7.872 2.002 2.093
1.938 2.000 2.209 2.309
2.779 2.788 2.476 2.526
2.300 2.375 2.622 2.742
2.487 2.562 2.828 2.9s9
2.662 2.750 ).035 3.775
2.844 2.9)8 ).242 ).392
).o25 3.725 J.449 3.608
3.388 3.500 3.862 4.047
3.750 3.875 4.275 4.474
4.772 4.250 4.688 4.907
4.475 4.625 5.702 5.)40
4.838 5.000 5.575 5.774
5.200 5.375 5,928 6.207
5.562 5.750 6.J47 6.640
5.925 6.72s 6.755 7.073
Thickness Heavy Hex
Nuts, H
ts/eo 0.218 0.250
"/uo o.28o 0.314
'3/a,, 0.347 0.3772'/øq o.4o3 0,447
t%o 0.464 0.504
t%o 0.526 o.56s
t%o 0.587 0.6)l
a7/eo 0.770 0.758
tt/ro 0.833 0.885
63/ø+ 0.956 7.072
t7/¿o 7.ot9 7.t39
77Áz 7.787 7.257
7ttÁ, t3to 7378
tls/t, r.4i7 7.50s
7te/t, 7.556 7.6J2
r2i/¡z t.679 t.759
r27/tz 1.802 1.886
tt%, t.925 2.or3
2t3/ø,, 2.755 2.257
2'%o 2.4ot 2.50s
2at/d+ 2.647 2.759
261/a,, 2.89) 3.073
i%ø 3.724 3.252
37Át 7.370 3.506
311/tø ).6t6 J]6o
315/tø J.862 4.014
Thickness Heavy
Hex lam Nuts, flr
GENERAL NOTES:
(a) For additional requirements refer to section 3, General Data.
(b) Chomfers ond Wosher Faces. Nuts in sizesT/16 in. nominal size and smaller shall be double-chamfered. Larger size nuts shall be dou'
ble-chamfered or have washer-faced bearing surfaceand chamfered top.
(c) Optionot Bearing Su(ace Runout Where purchaser specifìes close runout of bearing face style heavy hex or heavy hex iam nuts in nom'
inal sizes 2 in. to 4 in., nuts shall be so processed as to have a maximum bearing face runout of 0.010 in. FlM.
NOTES:
(1) See para. 3.1.
(2) See para. 3.2.
(3) See paras. 1.3 and J.9.
Max¡mum Runout of Bear¡ng
Surface to Thtead Axls, FIM
lNote (3)]
Basic Min. Max. ps¡
tluo 0.156 0.188 0.077 0.011 0.017
'%o o.7e6 0.220 o.o2o 0.012 o.o2ott/.,, o.2t6 0.252 0.021 0.014 0.021
'7/to 0.247 o.29s o.o22 0.015 o.o22
'e/øo 0.277 0.377 o.o2i 0.016 0.023
"/øo 0.307 0.349 0.024 0.077 0.0242i/oo o.3i7 o.JBt 0.025 0.018 0.025
"/ø,, 0.398 0.446 0.027 0'020 O.O27t%o 0.458 0.510 0.029 o.o22 o.o29
tt/øo o.5t9 0.575 0.031 0,024 0.031
t%o 0.s79 0.639 0.033 0.027 0.033
'%, 0.687 o.7st 0.035 o.o3o 0.0352s/2, 0.747 0.875 o.o3g 0.033 0.038
'7/tz 0.808 0.880 0.041 0.036 0.041
'e/r, 0.86g 0.944 0.044 0.038 o.o44t%, 0.929 7.oo9 0.048 0.041 0.048
71/zz 0.989 7.073 0.051 0.044 0.051
73/zz 1.050 1.138 0.055 0.047 0.055
t13/6,, 7.755 7.257 0.061 0.052 0.061
72e/64 7.407 7.505 0.068 0.058 0.068
737/64 t.522 7.634 0.074 0.064 o.o74
74%4 7.64i 7.763 0.081 o.o7o 0.081
t1%6 t.748 7.876 0.087 0.075 0.087
t15/16 r.g7o 2.006 o.o94 0.081 0.094
21Ae 7.990 2.7J4 0.100 0.087 0.100
23/r, 2.772 2.264 0.707 0.093 0.107
Heavy Hex Nuts Heavy
Specified Proof Hex lam
Load Nuts
Up to 150,000 Alt
150,000 psi and Strength
Greater Levels
1,4
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leandro
Retângulo
PORCA SEXTAVADA PESADA - TABELA 10
Table 11 Dimensions of Heavy Hex Slotted Nuts
ASME 818.2.2-2010
Nominal
Size
Basic Maior
Diameter of
Thread
['l-- oo16in
tfl 
appr'x
1t
/a
'he
/7
9t
5t
/8
1t
'/e
7
lle
lt/o
lTe
1%
1T,,
2
2%
2%
2%
3
3ya
3%
3Tq
4
0.2 500
o.1725
o.3750
o.4375
0.5000
o.5625
o.6250
0.7500
0.8250
1.0000
7.7250
7.2500
7.)750
1.5000
7.7500
2.0000
2.2500
2.5000
2.7500
3.0000
1.2s00
3.5000
3.7500
4.0000
Width Across Flats, F
[Note (1)]
l, 0.488e/ro 0.546
'%u 0.669
To 0.728
7" o.B5o
"Au 0.909llre 1.031
lYt 1.2t2
t7Áe 7.J94
1% t.s75
tt%ø 7.756
2 7.938
23Aø 2.779
2% 23oo
27,, 2.662
ila J.o25
i% 3.388
37s J.750
h|/t 4.772
4% 4.4ts
5 4.838
5% 5.2oo
5Tr 5.562
6ls s.925
Width Across
Corners, G
lNote (2)l
Max. Min. Max.
0.500 0.556 0.577
0.562 0.622 0.650
0.ó88 0.7$ 0.794
0.750 0.830 0.866
0.875 0.969 1.010
0.938 7.OJ7 1.083
7.062 7.775 7.227
7.250 7.382 7.443
7.438 7.589 7.660
7.625 7.796 7.876
7.872 2.002 2.O9)
2.000 2.209 2.309
2.788 2.476 2.526
2.375 2.622 2.742
2.750 3.O)5 3.775
).725 3.449 3.608
3.500 3.862 4.047
3.875 4.275 4.474
4.250 4.688 4.907
4.625 5.702 5.340
5.000 5.575 5,774
5.375 5.928 6.207
5.750 6.747 6.640
6.725 6.755 7.O73
Thickness, fl
t%o 0.218
te/eo o.28o
"/øq 0.34727/ø,, o.4ojt%o 0.464
35/to 0.526
te/øo o.sï7
a7/eo 0.770
55/oo 0.833u%o o.9s6
77/ø,, 7.079
77/tz 7.787
7t%, 1.310
7t%, 7.4i)
723/zz 7.679
rt%, 7.92s
2ttho 2.t5s
2'e/øo 2.407
245/ø,, 2.647
261øo 2.893
irÁe 3.124
iTAo 3370
3'lrø 3.676
)ls/rø 3.862
GENERAL NOTES:
(a) For additional requirements, refer to section 3, General Data.
(b) Chamfers and Washer Faces. Nuts in sizesTAø in. nominal size and smatler shall be double-chamfered. Larger size nuts shall be
double-chamfered or have washer-faced bearing surface and chamfered top.
NOTES:
(1) See para. 3.1.
(2) See para. 3.2.
(3) See para. 3.2.
(4) See paras. 3.3 and 3.9.
Min. Max. Min. Max. Min. Max. lNote (a)]
0.250 0.13
0.374 0.79
0.377 0.22
0.447 0.26
0.504 0.32
0.568 0.3s
0.637 0.38
0.758 0.47
0,885 0.59
7.072 0.69
7.739 0.75
7.257 0.83
7.378 0.95
1.505 1.01
7.759 7.20
2.073 1.38
2.257 7.62
2.505 7.74
2.759 7.99
J.07? 2.77
3.252 2.47
3.506 2.65
3.760 2.90
4.074 ).75
0.15 0.07 0.10 0.077
o.27 0.09 0.72 0.020
o.24 0.72 0.15 0.021
0.28 0.72 0.15 0.022
0.34 0.15 0.18 0.023
0.77 0.15 0.18 0.024
o.40 0.18 0.24 0.025
o.49 0.18 0.24 0.027
0.62 0.18 0.24 0.029
0.72 0.24 0.30 0.031
0.78 0.24 0.33 0.033
0.86 0.31 0.40 0.035
o.99 0.31 0.40 0.038
1.05 0.J7 0.46 0.041
7.24 0.4) 0.s2 0.048
7.43 0.4J 0.52 0.055
7.67 0.43 0.52 0.061
7.79 0.55 0.64 0.068
2.O5 0.5 5 0.64 0.O7 4
2.23 0.62 0.77 0.081
2.47 0.62 0.77 0.087
2.72 0.62 0.77 0.094
2.97 0.62 0.77 0.100
).22 0.62 0.77 0.707
15
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Table 12 Dimensions of Hex Flange Nuts and Large Hex Flange Nuts
ASME 818.2.2-2010
Basic Maior Width Across
Nominal Diameter of tlats' F
Size Thread Min. Max,
No.6
8
10
72
1t
S/
/16
Te
7/
/16
1/
/2
9/
/16
5/
/a
To
0.1380
o.7640
0.1900
0.2760
0.2500
o.)725
0.7750
o.4375
0.5000
0.5625
0.62so
0.7500
0.302 0.J72
0374 0.J44
0.365 0.37s
0.428 0.438
0.428 0.438
0.489 0.500
0.5 51 0.562
0.675 0.688
0.7J6 0.750
0.861 0.87 5
0.922 0.938
1.088 1.725
Slight rounding
permissible
Width Across Diameter
Corners, G Flange, I
Min. Max, Min, Max.
1t
tAu
3t
/a
7/rø
1t
/7
9f
/16
5/
/a
0.342 0.?67
0.381 0.i97
0.476 0.4J3
0.488 0.505
0.488 0.505
0.557 0.577
0.628 0.650
0.76A 0.794
0.840 0.866
0.982 1.010
1.051 1.083
7.240 7.299
30 deg REF
0.2500
0.J725
o.)750
0.4775
0.5000
o.5625
0.6250
Hex Flange Nuts
Max¡mum
Runout of
Nut rhickness, Mtnimum ïå'H 3::ä::
Wrenching Thlcknãss, to Thread
Min. Max, Length, / K Axis, tlM
GENERAL NOTES:
(a) For additional requirements refer to section 3, General Data.
(b) Concentricity of Topped Hote. Aais of tapped hole shall be concentric with axis of nut body within a tolerance equal to 3% (60l" FIM) of
the maximum width across flats.
0.406 0.422
0.452 0.469
0.480 0.500
0.574 0.594
0.574 0.594
0.660 0.680
0.728 0.750
0.910 0.937
1.000 1.031
7.755 1.188
7.248 7.287
7.460 1.500
0.428 0.4J8
0.489 0.500
0.557 0.562
0.675 0.688
0.736 0.750
0.861 0.875
0.922 0.938
0.756 0.777
0.787 0.203
0.203 0.279
0.222 0.236
0.222 0.236
0.268 0.2A3
0.330 0.347
0.375 0.395
0.437 0.458
o.48? 0.506
0.545 0.569
0.627 0.675
0.488 0.505
0.557 0.577
0.628 0.ó50
0.768 0.794
0.840 0.866
0.982 1.010
1.051 1.083
Large Hex Flange Nuts
0.10
0.13
0.13
o,74
0.74
0.77
o.23
o,26
0.31
0.35
0.40
o.46
0.700 0.728
0.790 0.820
0.885 0.975
1.100 7.737
7,775 7.205
7.260 1.300
1.280 7.360
1,6
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0.02
0.02
0.03
0.04
0.04
0.04
0.04
0.04
0.05
0.05
0.05
0.06
0.281 0,372
0.343 0.375
0.390 0.406
0.437 0.4ó8
0.485 0.515
0.546 0.578
0.600 0.640
0.014
0.016
o.077
0.020
0.020
0.o23
o.o25
0.032
0.035
0.040
0.044
0.051
0.15
0.20
0.24
o.26
o.29
o.37
o.42
0.04
0.04
0.04
0.04
0.06
0.06
0.0ó
0.024
0.028
0.031
0.038
0.041
o.o44
0.045
ASME 818.2.2-2010
Table 13 Dimensions of Hex Coupling Nuts
Basic Major
Nominal Diameter of
Size Thread
#6
#8
#10
7/
7r
-/B
,/re
1l
/2
9t
/16
7"
il
7/
/a
7
lYg
1%
1y,
1%
7T',
77/e
2
21,,
2%
¡J/.
)
3YA
)1/) /)
3Tq
4
al',
4y,
AT,,
5
s%
s%
5%
6
0.138
o.764
0.190
o.250
0,372
0.37s
0.437
0.500
o.562
o.625
o.750
0.875
1.000
7.725
0.725
1.500
7.625
7.750
7.875
2.000
2,250
2.500
2.750
3.000
3.250
3.500
).750
4.000
4.250
4.500
4.7 50
s.000
5,250
5.500
5.7 50
6.000
width Across Flats, F
Basic Min. Max.
/r6
St
/16
5/
/16
7t
/16
1/
/2
9l
/16
5/
/a
/16
11t
/16
lil
/16
1
11,,
lTs
71/z
75/"
2
2e/rc
0.302 0.372 0344
0.302 0.372 0.344
0302 0.372 0.344
0.428 0.438 0.488
0.489 0.500 0.557
0.551 0.562 0.628
0.607 0.625 0.692
0.663 0.688 0.756
0.782 0.813 0.891
0.782 0.813 0.891
0.963 1.000 7.097
7.272 7.250 7.)82
7.J25 7.375 7.577
7.450 1.500 1.653
7.575 7.625 7.825
1.950 2.000 2.275
2.481 2.562 2.828
W¡dth Across
Corners, G
Min, Max.
Note (11
0.361
0.361
0.361
0.505
0.577
0.650
o.722
o.794
0.939
o.939
7.755
7.447
1.588
7.732
7.A76
2.309
2.959
3.775
3.)92
3.608
4.047
4.47 4
4.907
5.340
5.773
6.206
6.6J9
7.O72
7.506
7.9)9
8.372
8.805
9.238
9.677
10.104
70.5)7
Length, f,
1/
/2
/a
3t
1%
7Tt
77,,
f/4
1To
21/a
21/g
21/4
2lz
2%
7
3
3%
47/s
51/q
57e
6
6%
7'/,
8%
9
e%
10%
111/4
72
t21/,,
11%1|yA
75
7f/q
ß'h
771/,,
18
27,, 2.662 2.750 3.035
215/tt 2.844 2.938 3.242
ïts 3.025 3.725 3.448
?lz 3.388 3.500 3.862
i7/e 3.7 50 3.87 5 4.27 5
4lo 4.772 4.250 4.688
aTs h.475 4.625 s.101
s 4.838 5.000 5.575
sTe 5.200 5.375 5.928
Mln,
0.470 0.510
0.595 0.645
0.717 0.760
7.690 7.760
1.690 7.760
1.690 7.760
7.690 7.760
7.690 7.760
2.067 2.735
2.067 2.735
2.790 2.260
2.440 2.570
2.690 2.760
2.940 3.010
2.940 3.010
3.440 3.570
4.830 4.970
5.270 5.290
5.580 5.670
5.950 6.040
6.700 6.800
7.440 7 .550
8.190 8.310
8.940 9.060
9.680 9.810
70.430 70.570
17.770 77.320
77.920 12.080
72.670 72.830
7).420 13.580
74.760 74.f40
74.970 15.090
75.650 15.850
76-400 16.600
77.750 77 .J50
77.a90 18.110
5tA
6le
6lz
67/e
7ya
75/a
8
gTe
ïTa
9le
5.562 5.750 6.340
5.925 6.725 6.754
6.288 6.500 7.768
6.650 6.875 7.s87
7.072 7.250 7 .994
7.375 7 .625 8.408
7.738 8.000 8.827
8.100 8.375 9.234
a.462 8.750 9.647
8.825 9.725 10.060
1,7
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ASME 818.2.2-2010
Tabte 13 Dimensions of Hex Coupling Nuts (Cont'd)
GENERAL NOTES:
(a) For additional requirements, refer to section 3, General Data.
(6) Concentricity of Tapped Hole. Axis of tapped hote shatl be concentric with axis of nut body within a
tolerance equal to )y" (6% tl/¡t/') of the maximum width across flats.
(c) Countersink. Tapped hote may be countersunk on both faces.
(d) When specified by the purchaser, different thread sizes or series shatl be tapped into the nut from
opposite ends with each thread extending to approximately 0.5H. All other nut dimensions shatl
comply w¡th Table 13 unless otherwise agreed to by the supplier and purchaser.
(e) The dimensions in Table 13 are considered standard, but purchasers may specify across flats sizes
and/or lengths that differ from this table.
(D Hex coupling nuts must conform to the proof load requirements of ASTM A 563, Grade A for heavy
hex nuts,
NOTE:
(1) Nuts shall be furnished without a hole, unless specially ordered by the purchaser' ln some
applications it may be desirable to assure that the threaded parts joined by a coupling nut are
each engaged to approximately one-half nut th¡ckness. As a visual inspection aid, a hole drilled
through one side of the nut is recommended. The hote should be located at mid-nut thickness,
and have a diameter of 0.2 to 0.4 times nominal nut size for sizes 21/2iî. and smaller, and 1 in'
for sizes 23/tin. and laßer.
18
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The gages specified in Table I-1 shall be used to deter-
mine the acceptability of the alignment and bottom con-
tours of the slots in slotted nuts in accordance with the
following procedure.
The gaging for slot alignment provides for equal varia-
tions in the location of the cotter pinhole in the bolt and
the location of the slots in the nut.
To inspect the nut, the slotted end of the gage shall
be inserted through the threaded hole from the bearing
surface of the nut. The gage pin shall then be inserted
into both the gage slot and the nut slots through three
SLOT GAGES AND GAGING FOR SLOTTED NUTS
ASME 818.2.2-2010
MANDATORY APPENDIX I
adjacent faces of the nut, consecutively. Slot alignment
shall be considered satisfactory if the gage Pin fits into
the slots without interference at all three gaging posi-
tions. The bottom contour shall be acceptable if the gage
pin contacts the bottom surfaces of opposite slots during
the alignment gaging at all three positions.
Some deviations from the specified gage plug diame-
ters, D, may be necessary to comPensate for variations
in the nut thread minor diameter due to differences in
manufacturing practices. To ensure adequate service life,
gages and gage pins shall be suitably hardened.
1,9
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Tabte l-1
Contour beyond this
face optional ------t<- AJe*tt
ASME 818.2.2-2010
Dimensions of Slot Gages and Gage Pins
Nominal
Size
Minimum
Gage
Basic Maior Pilot
Diameter of tength,
Thread A
l/
-/16
1/
/a
/16
1t
/2
'/rc
S/
/a
J/
7t
/e
1
11"
1%
1Te
1%
17,,
2
2Y4
2y,
23k
)
)1/4
3%
¡3t
4
6
0.2500
0.7725
0.3750
0.4375
0.5000
0.5625
0.6250
0.7500
0.8750
1.0000
7.7250
1.2 500
7.)750
1.5000
7.7500
2.0000
2.2500
2.5000
2.7500
3.0000
3.2500
3.5000
3.7500
4.0000
Pin must be round
and straight for
Maximum Minimum
Gage Gage
Plug Face
Length, Diameter,
BC
this lensth 
J.-'---_l _"
-:{:.o*ouror,.,r.J
0.288
0.316
0.475
0.463
0.573
0.627
0.737
0.827
0.922
1.018
7.776
7.272
7.399
7.526
7.759
2.073
2.257
2.505
2.7 59
3.073
Gage Plug
Diameter, D
lNote (1)] Gage
Coarse Fine Pitot
Thread Thread Diameter,
-OJO0 .t"* =
-0.001 -0.001 t0.005
0.110
0.150
0.180
0.200
o.260
0.280
0.310
o.370
0.480
0.5 50
0.600
0.660
0.770
0.810
1.190
7.370
1.610
7.7JO
1.980
2.760
2.400
2.640
2.890
3.740
o.375
o.406
0.500
0.562
o.625
o.70J
0.787
0.938
7.709
7.250
7.406
7.s62
7.778
7.875
2.1 88
2.500
2.818
3.725
3.4J8
3.750
4.062
4.175
4.688
5.000
opt¡onal
Gage Pin
o.796
o.252
o.307
0.360
o.477
o.472
0.527
o.642
0.755
0.865
o.970
1.095
7.795
7.320
7.5)4
7.7 59
2.009
2.229
2.479
2.729
2.979
3.229
3.479
3.729
0.277
0.267
0.330
0.383
0.446
0.502
o.565
o.682
0.798
0.910
1.035
7.760
7.285
7.470
NOTE:
(1) Diameters tabulated are equivalent to the minimum minor diameters of Class 2B threads. lf the nuts are not threaded with unified
coarse (UNC) or fine (UNF) threads, the diameter of gage shall be the same as the diameter of the GO thread plug gage for the bore.
cage Gage Pin
Slot Diameter, Minimumwidth,F G GagePin
+0.002 +0.000 Length,
-0.000 -0.002 H
0.181
0.2J7
0.292
0.345
o.402
o.457
o.572
0.627
0.740
0.850
o.955
1.080
1.180
1.305
7.579
7.7 44
7.994
2.274
2.464
2.774
2.964
J.274
3.464
3.774
3.252
3.506
J.760
4.074
0.065 0.0ó5
0.085 0.085
0.115 0.115
0.775 0.115
0.745 0.745
0.745 0.145
0.775 0.775
0.77 5 0.77 5
0.775 0.775
0.235 0.235
0.235 0.235
0.305 0.305
0.305 0.305
o.J65 0.365
0.425 0.425
0.425 0.425
0.425 0.425
0.545 0.545
0.545 0.545
0.675 0.675
0.675 0.ó15
0.675 0.675
0.615 0.675
0.675 0.615
1.00
1.06
7.79
7.25
1.38
r.44
7.56
7.75
7.94
2.72
2.37
2.50
2.69
2.88
3.25
3.62
4.00
4.38
4.7 5
5.72
5.50
5.88
6.25
6.62
20
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Table A-1 specifies formulas for various nut
dimensions.
NONMAN DATORY APPENDIX A
FORMULAS FOR NUT DIMENSIONS
ASME 818.2.2-2010
2l
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Square
Nut Type
Hex Flat 71/"to 7t/, F = 7.500D 0.050D H = 0.8750
Hex Ftat Jam 1% F = 1.500D 0.050D H = 0.500D +
0.062
t1/4totf F= 1.500D 0.050D H = 0.500D+
0.725
Hex and Hex Slotted lo F = 1.500D + 0.015D + H -- O.875D
0.062 0.006t/røto% F=7.5ooD o.o15D+ H=o.B75D
0.006
3/,,Torl/e F = t.5o0D o.o5oD H = o.B75D-
0.016
71/Áto7y2 F= 1.500D o.o5oD H : 0.8750 -
0.031
HexJam y, F=7.5ooD+ 0.015D+ H=SeeTable
0.062 0.006s/re¡ot/" F= 1.500D 0.015D+ H = SeeTable
0.006
% to t1/" F = 1.5000 o.o50D H = 0.500D +
0.o47
71/4ro t1/2 F = 1.500D 0.050D H = 0.5ooD +
0.094
Hex Thick, and Hex lo F = 1.500D + 0.015D + H = See Table
Thick Slotted 0.062 0.006
tAe To t/e F = 7.5OOD 0.015D + H = See Table
0.00ó
% to t1/, F = 7,5ooD o.o5oD H = See Tabte
ASME 818,2.2-2010
Tabte A-1 Formutas for Nut Dimensions
Nut S¡ze
t/o to s/, F = 1.500D + 0.050D H = 0.875D 0.016D +
0.062 0.012
)¡oto 71¡, F = t.5o0D 0.050 D H = 0.875D 0.016D +
W¡dth Across Flats Nut Thickness
Baslc Tolerance Basic Tolerance
[Note (r)] (Minus) lNote (2)] (Plus or Minus)
o.o72
0.016D +
o.o72
0.016D +
0.012
O.016D +
0.012
0.015D +
0.003
0.015D +
0.003
O.O16D +
0.o72
0.016D +
0.012
0.015D +
0.003
0.015D +
0.003
0.016D +
0.o72
0.016D +
0.012
0.015D +
0.003
0.015D+
0.003
0.015D +
0.003
O.076D +
0.012
[Note (3)]
0.016D +
0.012
lNote (3)l
O.O76D +
o.072
lNore (4)]
0.016D +
0.o72
[Note (a)l
0.076D +
o.072
lNote (4)l
Width Across Corners
1.373 x (Min. F)
-0.030
1.373 x (Min. F)
-0.030
1.14 x (Min. F)
1.14 x (M¡n. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (M¡n. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.373 x (Min. F)
- 0.030
Min,
Llmlts, G
Heavy Square 1/ato 71/, F = 7.500D + 0.050D H = 1.000D
o.725
HeavyHexFlat 1l/Bto4 F= 1.500D+ 0.050D H= 1.000D
o.725
Heavy Hex Flat lam % to t1/u F = 7.5oOD + 0.050D H = o.SoOD +
0.725 0.062
rl/qto 21/t, F = 7.5ooD+ 0.050D H = 0.500D+
0.725 0.725
21/2ro4 F = 7.5ooD+ 0.050D H = o.SooD+
0.725 0.250
1.4142 x (Max.F)
1.4742 x (Max.F)
1.1547 x (Max.F)
Max.
1.1547 x (Max.F)
7.7547 x (Max.F)
7.7547 x (Max.F)
7.7s47 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
7.7547 x (Max.F)
1.1s47 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
22
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1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
7.4742 x (Max.F)
1.1547 x (Max.F)
7.7547 x (Max.F)
7.7s47 x (Max.F)
1.1547 x (Max.F)
Heavy Hex and l/a to tl"
Heavy Hex Slotted
t%to z
z%to t
31/o ao 4
Heavy Hex Jam 1,, to t%
71/a to 2
2y4
zlto I
)YL ¡o 4
Nut Type
ASME 818.2.2-2010
Table A-1 tormulas for Nut Dimensions (Cont'd)
Nut Size
Width Across Flats
Basic Tolerance
lNote (1)l (Minus)
F = 7.500D 0.050D
+ 0.725
F = 1.s00D 0.050D
+ O.725
F = 7.5O0D 0.050D
+ O.725
F = 7.5OoD 0.050D
+ O.725
F = 7.'OOD 0.050D
+ 0.725
F = 7.5OOD 0.050D
+ O.725
F = 7.500D 0.050D
+ 0.125
F = 1.500D 0.050D
+ 0.725
F -- 7.5000 0.050D
+ 0.725
NOTES:
(1) Adiusted to s¡xteenths.
(2) 1/4 in. to 1 in. sizes adiusted to sixty-fourths. 1% in. to z1/2 in. sizes ad¡usted upward to thirty-seconds. 23h in. fo 4 in. sizes adjusted
upward to sixteenths.
(3) Plus tolerance only. Minus tolerance adiusted so that minimum thickness is equal to min¡mum thickness of heavy hex nut.
(4) Plus tolerance only. Minus tolerance adiusted so that m¡n¡mum thickness is equaI to minimum thickness of heavy hex iam nut.
where
D = nominal nut size or basic diameter of the thread
F = width across flats
G = width across corners
Baslc Tolerance
lNote (2)l (Plus or Minus)
Nut Thickness
H = 1.000D 0.016D +
- 0.016 0.072
H = 7.0OOD 0.0760 +
- 0.031 0.012
H = 7.OOOD O.O76D +
- o.o47 0.012
H -- 7.0OOD 0.016D +
- 0.062 0.072
H = 0.500D 0.016D +
+ 0.047 0.012
H = O.SOOD 0.016D +
+ 0.094 0.012
H = O.SOOD 0.016D +
+ 0.078 0.012
H = 0.500D O.076D +
+ 0.203 0.072
H = 0.500D 0.01óD +
+ 0.188 0.072
Width Across Corners
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
1.14 x (Min. F)
Min.
timits, G
1.1547 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
7.7547 x (Max.F)
1.1547 x (Max.F)
1.1547 x (Max.F)
Max.
23
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NONMANDATORY APPENDIX B
WRENCH OPENINGS FOR SQUARE AND HEX NUTS
Table B-1 specifies wrenc.h openings for square and
hex nuts.
ASME 818.2.2-2010
24
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Maxlmum
Basic Nut
Size of Across
Wrench, Flats
W lNote (1)]
ASME 818.2.2-2010
Table B-1 Wrench Openinç for Square and Hex Nuts
Allowance
Between
Nut Flats
and
wÀncn Wrench Openings
Jaws Tolerance
fNote (2)l Min. lNote (2)] Max,
5t
/32
3t/t6
1t
5t
/16
11t
lt
/e
7t
/16
1/
/2
9t
/16
/8
11t
/16
3/
t3/
/16
U"
lS/
/16
7
7tAø
11/B
11/t,
TsAe
77/rd
1%
7s/e
" 11tt /16
713Áa
77/e
2
2lte
2%ø
2%
2Te
2e/ro
2%
o.756
0.188
0.250
o.J72
0.744
0.J75
0.438
0.500
o.562
o.625
0.688
o.750
0.813
o.875
0.938
1.000
7.063
7,725
7.250
7,37)
7.438
1.500
7.625
1.688
1.813
7.875
2.000
2.O63
2.1 88
2.250
2.375
2.56J
2.750
2.938
3.725
3.500
3.875
4.250
4.625
5.000
5.375
5.7 50
6.725
0.002 0.158
0.002 0.190
0.002 0.252
0.003 0.315
0.003 0.347
0.003 0.J78
0.003 0.440
0.004 0.504
0.004 0.566
0.004 0.629
0.004 0.692
0.005 0.755
0.005 0.818
0.005 0.880
0.006 0.944
0.00ó 1.00ó
0.006 1.068
0.007 7.7)2
0.007 7.257
0.008 7.320
0.008 7.446
0.008 1.508
0.009 7.6i4
0.009 1.696
0.010 7.822
0.010 1.885
0.011 2.077
0.011 2.074
0.072 2.200
0.012 2.262
0.013 2.388
0,014 2.576
0.014 2.766
0.016 2.954
0.077 3.742
0.019 3.518
0.020 3.895
0.022 4.272
0.024 4.649
0.026 5.026
0.028 5.40)
0.030 5.780
0,032 6.757
0.005 0.76J
0.005 0.195
0.005 0.2s7
0.006 0.327
0.006 0.35)
0.006 0.384
0.00ó 0.446
0.006 0.510
o.oo7 0.573
0.007 0.636
0.007 0.699
0.008 0.767
0.008 0.826
0.008 0.888
0.009 0.953
0.009 1.015
0.009 7.077
0.010 7.742
0.010 7.267
0.011 7.3J7
0.011 7.457
0.012 7.520
0.012 7.646
0.012 7.708
0.013 7.835
0.013 1.898
0.014 2.O2s
0.014 2.088
0.015 2.275
0.015 2.277
0.016 2.404
0.077 2.593
o.o77 2.783
0.019 2.97 j
0.020 ).762
0.022 3.540
o.o2) 3.978
0.025 4.297
0.027 4.676
0.029 5.055
0.031 5.4)4
0.033 5.813
0.035 6.192
Hex Flat, Hex Flat ram,
Hex, Hex Jam, Hex
Machine Slotted, Hex Thick, Hex
Screw Square Thick Slotted, Heavy
Nuts Nuts Hex Slotted
#o, #7
#2, #7
#4
#5, #6
#8
#10
#12, y4
Nominal Nut S¡zes
;;'
/16
3t
/a
lo
:"
/t6
'!:.
Heavy Square, Heavy
Hex Flat, Heavy Hex Flat
lam, Heavy Hex, Heavy
Hex lam
¡15 tz /16
)t/g
J%
)7e
41/4
4%
5
s%
s%
6%
. 7/rø
./)
7/
/16
/8
;),;
NOTES:
(1) Wrenches are normally marked with "Basic Wrench Size,'which corresponds to the basic (maximum, in most cases) width across ftats
dimension of the respective nut. For specific requirements applicabte to wrenches, refer to the appropriate ASME 8107 standard, which
covers the particutar wrench type.
(2) Allowance (minimum clearance) between maximum width across flats of the nut and iaws of wrench equals (0.005!y+ 0.001). Toler-
ance on wrench opening equals plus (O.O05W+ O.OO4 from minimum), where W = nominal size of wrench.
7/
St
/16
't'i
/a
'/rc
,,,i
/2
/16
7
lla
l1/o
i)"
;ii,
25
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1Y4
1%
;;),
7s/s
73/o
17/e
2
2%
21/,
2%
)
31,,
3%
3r/o
INTENTIONALLY LEFI BLANK
26
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818 AMERICAN NATIONAL STANDARDS FOR BOLTS, NUTS, RIVETS, SCREWS,
WASHERS, AND SIMILAR FASTENERS
Smatl Solid Rivets
Large Rivets.....
Metric Small Solid
Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Ftange,
Lobed Head, and Lag Screws (lnch Series)
Nuts for General Applications: Machine Screw Nuts, Hex, Square, Hex Flange,
and Coupling Nuts (lnch Series)
Metric Hex Cap Screws
Metric Formed Hex Screws
Metric Heavy Hex Screws
Metric Hex Flange Screws.
Metric Hex Bolts
Metric Heavy Hex Bolts.
Metric Heavy Hex Structural Bolts
Metric Heavy Hex Flange Screws
Metric Hex Nuts, Style 1
Metric Hex Nuts, Style 2.
Metric Slotted Hex Nuts
Metric Hex Ftange Nuts.
Metric Hex Jam Nuts . . . .
Metric HeaW Hex Nuts
Metric Flanged 12-Point Head Screws
Fasteners for Use in Structural Applications
Metric 12-Spline Flange Screws
Clearance Holes for Bolt, Screws, and Studs
Straightness Gage and Gaging for Bolts and Screws
Socket Cap, Shoulder, and Set Screws, Hex and Sptine Keys (lnch Series)
Socket Head Cap Screws (Metric Series)
Metric Series Hexagon Keys
Hexagon Socket Head Shou
Hexagon Socket Button Head Cap Screws (Metric Series)
Hexagon Socket Flat Countersunk Head Cap Screws (Metric Series)
Metric Series Socket Set Screws ......
Round Head Bolts (lnch Series)
Metric Round Head Short Square Neck Bolts
Metric Round Head Square Neck BoltsWood Screws (lnch Series)
Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws (lnch Series)
and Bits.
Machine Screws and Machine Screw Nuts
lder Screws (Metric Series)
Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws (lnch Series)
Metric Thread-Forming and Thread-Cutt¡ng Tapping Screws
818.1.1-1972 (R2006)
878.7.2-7972 (R2OO6)
Metric Machine Screws
818.1.3M-1983 (R2006)
Wing Nuts (lnch Series).
General Purpose Semi-Tu
Metric General Purpose Semi-Tubular Rivets
Clevis Pins and Cotter Pins (lnch Series). .
Taper Pins, DoweI Pins, Straight Pins, Grooved Pins, and Spring Pins (lnch Series) ..
878.2.].1M-7999 G2005)
Spring Pins: Coiled Type, Spring Pins: Slotted, Machine Dowel Pins: Hardened Ground,
8 1 8.2.1 -201 0
87a.2.2-2070
878.2 3.)M-7979 (R2001)
818.2.3.4M-2001 (R2006)
878.2.3.5M-7979 (R2006)
and Grooved Pins (Metric Series)
Cotter Pins, Headless Clevis Pins, and Headed Clevis Pins (Metric Series)
, . . . 818.2.3.6M-1979 (R2oo6)
Plow Bolts
818.2.3.2M-2005
Track Bolts and Nuts
bular Rivets, Full Tubular Rivets, Sptit Rivets and Rivet Caps
878.2.J.7 M-7979 (R2006)
MiniatureScrews....
Glossary of Terms for Mechanical Fasteners
818.2.3.9M-2001 (R2006)
818.2.4.1M-2002 (R2007)
Screw and Washer Assemblies - Sems (lnch Series).
Screw and Washer Assemblies: Sems (Metric Ser¡es)
. 818.2.4.6M-2010
878.2.4.3M-7979 (R2006)
878.2.4.4M-7982 (R2005)
87a.2.4.2M-2005
818.2.4.5M-2008
818.2.7.1M-2002 (R2007)
818.2.5M-2009
818.2.8-1999 (R2010)
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818.2.6-2010
.818.3.1M-1986 (R2008)
.818.3.2M-1979 (R2008)
.818.3.3M-1986 (R2008)
.818.3.4M-1986 (R2008)
818.3-2003 (R2008)
878.2.9-2070
818.3.5M-1986 (R2008)
818.3.6M-1986 (R2008)
....... 878.6.2-1998 (R2010)
818.s.2.2M-l982 (R2005)
818.5-1990 (R2003)
818.5.2.1M-2006
818.6.1-1981 (R2008)
...,....878.6.7M-1999 (R2010)
818.6.3-2003 (R2008)
818.ó.5M-2000 (R2010)
. 818.6.9-2010
818.8.1-1994 (R20oo)
818.7.1M-2007
818.8.100M-2000 (R2005)
818.8.200M-2000 ß2005)
87A.7-2007
818.8.2-2000
818.10-1982 (R2005)
818.11.1961 (R2005)
818.12-2001 (R2006)
818.13-1996 (R2008)
... 818.13.1M-1998 (R2003)
87a.9-2007
Prevailing-Torque Type Steel Metr¡c Hex Nuts and Hex Flange Nuts
serrated Hex Flange Locknuts 90,000 psi (lnch Series)
Nylon lnsert Locknuts (lnch Series)
lnspection and Quality Assurance for General Purpose Fasteners
lnspection and Quality Assurance for High-Volume Mach¡ne Assembly Fasteners
lnspection and Quality Assurance for Special Purpose Fasteners
lnspection and Quality Assurance for Fasteners for Highly Specialized
lnspection and Quality Assurance Plan Requiring ln-Process lnspection and Controls.
Quality Assurance Plan for Fasteners Produced in a Third Party Accreditation System
Quatity Assurance Plan for Fasteners Produced ¡n a Customer Approved Control Plan
Washers: Helical Spring-Lock, Tooth Lock, and Plain Washers (lnch Series).
Lock Washers (Metr¡c Series)
Double Coil Helical Spring Lock Washers for Wood Structures
Metric Plain Washers.
Part ldentifying Number (PlN) Code System for 818 Fastener Products
Square and Rectangular Keys and Keyways.
Woodruff Keys and Keyways
Square and Rectangular Keys and Keyways: Width Tolerances and
Deviations Greater Than Basic Size
Tapered and Reduced Cross Section Retaining Rings (lnch Series) ... ..
Helicat Coil Screw Thread lnserts - Free Running and Screw Locking (lnch Series).
Helical Coil Screw Thread lnserts: Free Running and Screw Locking (Metric Series)
Open-End Blind Rivets With Break Mandrels (Metric Series)
Metric Continuous and Double-End Studs.
Continuous and Double-End Studs. . .
Threaded Rods (lnch Series)
Threaded Rod (Metric Series)
The ASME Publications Catalog shows a complete tist of all the Standards published by the Society. For a complimentary catalog, or the latest
information about our publications, call 1-800-THE-ASME (1-800-843-2763).
818.15-1985 (R2008)
818.1óM-2004 (R2009)
818.16.4-2008
818.16.6-2008
818.18.1-2007
818.18.2-2009
818.18.3M-1987 (R2005)
818.18.4M-1987 (R2005)
818.1 8.sM-l998 (R2009)
818.18.6M-1998 (R2009)
818.18.7M-1998 (R2009)
818.21.2M-1999 (R2005)
..... 818.21.3-2008
818.22M-1981 (R2010)
818.21.1-2009
818.25.1M-1996 (R2008)
818.2 5.2M-1996 (R2008)
818.25.3M-1998 (R2oo8)
878.24-2004
818.27-1998 (R2005)
,.... . . 818.29.1-2010
818.30.1M-2000 (R2005)
.818.31.1M-2008
878.29.2M-2005
. 818.31.2-2008
818.31.3-2009
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ASME 819.2.2-2070
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